172 UNITED STATES AND MEXICAN BOUNDARY 



diameter J on very short pedicels. Fruit 1^ line long. This seems to be the same as No. 1425 

 (which is without leaves) of Coulter's Mexican Collection ; hut B, spicata, as described by Choisy, 

 differs in the lanceolate acute leaves and in some other unimportant characters. 



BoERUAAViA scANDENSj Linn.; CJioisyy L c. B, Grahami, Gray^ I. c. Dry ravines near the 

 Cibola of the Eio Grrande^ August ; Bigeloiv. El Podrero, Sonora, June ; Schott. (No. 3204 



and 3205, Berlandier.) We can discover no essential difference between B. Grahami and our 

 West Indian specimens of B. scandens. Indeed, Dr. Gray suspected they were not distinct. 

 The free portion of the calyx-tube is as short in the latter as in the former^ and neither plant is 

 climbingj being only prostrate, or not unfrec^uently even erect ; so that the specific name is in- 

 appropriate. 



BoERHAAViA ERiosoLENA, Gray, I. 0. p. 322. Gravelly plains near Presidio del Norte, and 

 below the Great Canon of the Rio Grande, September ; Parry ^ Bigelow. Annual. Plant 1-2 



feet high. Leaves orbicular-cordate, 1^-2| inches in diameter. Flowers often precociously 

 fructified, and then the somewhat persistent tube becomes more or less elongated, sometimes 

 5-8 lines or more ; but the limb, in such cases, does not expani. 



BoERHAAViA LEiosoLENA (n. sp.) I pereunis ; caule glabro erecto superne nudo ; foliis rotundato- 

 cordatis carnosis utrinque elevato-punctatis margine crenato-denticulatis glandulosisque ; pani- 

 culee ramis distantibus paacifloris, pedicellis subfasciculatis brevissimis ; bracteis bracteolisque 

 minutis ; perianthii tubo elongato glabro ; fructu turbinato 10-striato ; staminibus 5. In gyp- 

 seoujs soil, Great Canon of the Rio Grande, 70 miles below El Paso, June ; Parry. Stem 2-3 

 feet high, arising from a somewhat ligneous root. Leaves 2-3 pairs, near the base of the stem, 

 2-3 inches in diameter, roughened on both sides, (at least in dry specimens,) with little elevated 

 dots or papillae, and the upper surface somewhat flocculose-pubescent. Panicle naked or with 

 only a pair of small leaves at the base of the lowest branches. Flowers somewhat fasciculate 

 toward the summit of the branchlets. Perianth with the free portion of the tube nearly an inch 

 long, the limb ovate but scarcely expanded in any of our specimens ; the adherent portion of 

 the tube expanded at the summit into an annulate narrow wing. Fruit about 2\ lines long, 



turbinate, crowned with a conical summit. This is evidently allied to the last species, and is a 

 very remarkable plant. 



BoERHiAViA GiBBOSAj Pavon. J Gray^ I. c. p. 323. Tinantia gypsophiloides, 3Iart. d Gal.; 

 Clioisy^ I. c. 2>. 457- Borders of the Rio Grande, from El Paso to the mouth of the Pecos, anl 

 south-westward, April — October. 



My friend Dr. Gray, wlio has lately revised the North American genera of Nyctaginaceaj and 



me 



J. T. 



1. MIRABILEiE. Involucrum calyciforme, gamophyllnm, 1-12-florum. Stigma capitatum, 

 granulatum. 



* Anthocarpium symmetricum, apterum. Involucrum 5-fidum. 



MiRABiLis, Linn. Anthocarpium heve, hand angulatum, ecostatum aut vix costatum, ovoi- 

 deum. Involucrum herhaceum, post anthesin vix mutatum. Stamina saepissime 5. 



OxTBAPHUS, UHer. Anthocarpium 5-costatum, obovatum vel clavatum, costis validis, In- 

 volucrum post anthesin auctum, rotato-explanatum,, scariosum, reticulatum. Stamina sjepis- 

 sime 3. 



** Anthocarpium Iteve, hinc excavatum, marginibus alaeformibus rigidis plerumque dentatis 



m 



